Which cable and automatic machine should I choose to connect a 9 kW electric boiler?
Hello, in a cottage of 200 sq.m there will be a powerful electric boiler of 9 kW. The house is 220V, SIP 2x16. Tell me, what kind of wires to take next from the self-supporting insulated wire to the meter and from the meter to the boiler, and to which machine to connect it?
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Hello! The load of 9 kW is a current of 41 A. In addition to the electric boiler, other electrical appliances will be switched on in the cottage, so you need to take into account their load so that when the boiler is on, do not limit yourself in the operation of other electrical appliances. Taking into account the load of all electrical appliances, select the rating of the machine. But in your case, the SIP 2x16 wire limits the load, so you can not put a circuit breaker with a rating above 50 A, when the machine is installed at a higher rating, the wire can be overloaded. It is also necessary to take into account the maximum current for which the meter is designed and, based on these data, choose a machine.
If you need to install the machine at a higher nominal value, you should contact the supplying organization, which makes the connection to the power grid. There they will tell you what maximum power limit can be allocated to your cottage, and accordingly what kind of wire, automatic machine and metering device are needed.